Pest insects

Pest insects can have adverse and damaging impacts on agricultural production and market access, the natural environment, and our lifestyle. Pest insects may cause problems by damaging crops and food production, parasitising livestock, or being a nuisance and health hazard to humans.

Western Australia is free from some of the world's major pest insects. Biosecurity measures on your property are vital in preventing the spread of insects.

The Department of Primary Industries and Regional Development provides:

  • biosecurity/quarantine measures at the WA border to prevent the entry of pest insects
  • where relevant post border biosecurity measures
  • advice on widespread pest insects present in the state.

For advice on pest insects search our website, the Western Australian Organism List or contact our Pest and Disease Information Service (PaDIS).

For diagnostic services, please contact our Diagnostic Laboratory Services.

Articles

  • In Western Australia's Mediterranean-type climate, the survival of pests and diseases over summer is often critical in determining pest outbreaks and disease epidemics in broadacre crops.

  • Heavy infestation of aphids caused significant yield loss to canola in a high rainfall environment

  • Find out more about the most common insect pests of citrus trees occurring in home gardens in Western Australia and their control using natural or low toxic chemical controls.

  • Spur-throated locusts are mainly a tropical species which breed in the State’s north but can move large distances and can sporadically reach the Gascoyne and Mid-West regions.

  • Portuguese millipedes (Ommatoiulus moreletii) belong to a group of animals called Myriapoda (meaning many-legged), which also includes several native Australian millipedes and centipedes.

  • Cutworms are plump, smooth caterpillars, of several moth species. They feed on all crop and pasture plants, damaging them near the ground. The caterpillars hide under the soil or litter by day.

  • Russian wheat aphid is a major pest of wheat, barley and some grasses (Poaceae), which can cause significant yield losses.

  • Ant treatment and control options vary tremendously for homes, gardens, and businesses, depending on the ant species.

  • Brown marmorated stink bug (Halyomorpha halys) is a mottle brown coloured, shield shaped stink bug.

  • The olive lace bug, Froggattia olivinia, is native to eastern Australia. It has become established in the olive growing regions of Western Australia.

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